Malicious PDF — malware analysis report

Static analysis result for SHA-256 057b56529337be21…

MALICIOUS

PDF

146.9 KB Created: 2021-03-25 05:54:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 5544dbb14a5c462f5568921333aa893c SHA-1: 540149aa85b23d2541280292760671b7f6cfbb8a SHA-256: 057b56529337be214a178bd6b89fcae6af8a21e74f351f16183d9d4d0bf1ff48
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded URLs, many of which point to disposable domains or link farms, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded links are consistent with techniques used to redirect users to malicious sites, potentially for credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://zajinet.ru/wix?keyword=yaskawa+a1000+manual+pdf+portugues PDF link annotation
    • http://xaninivinekeni.iblogger.org/43944321617.pdfIn PDF document text
    • https://befuvabesuwab.weebly.com/uploads/1/3/0/7/130740391/6053717.pdfIn PDF document text
    • https://zapufotipo.weebly.com/uploads/1/3/2/7/132740892/ketapeganurip.pdfIn PDF document text
    • http://sutarakikim.scienceontheweb.net/ravelerevuxabuwulone.pdfIn PDF document text
    • https://cdn.sqhk.co/lanumakefu/O0Shfhh/peacemaker_kurogane_movie_online.pdfIn PDF document text
    • https://vosumizajemuji.weebly.com/uploads/1/3/4/0/134041682/4882509.pdfIn PDF document text
    • https://cdn.sqhk.co/firijanab/gje2vCA/online_web_api_compiler.pdfIn PDF document text
    • http://fajiriduxir.medianewsonline.com/chemistry_notes_for_class_12_ncert.pdfIn PDF document text
    • https://cdn.sqhk.co/mogizufofuj/iiZgd2t/vinujanufasafidi.pdfIn PDF document text
    • http://paxejunon.mygamesonline.org/caprice_24_john_williams.pdfIn PDF document text
    • http://gazagidumow.mygamesonline.org/66366772826.pdfIn PDF document text
    • https://sunejojixin.weebly.com/uploads/1/3/1/0/131071277/7529209.pdfIn PDF document text
    • https://rixevabibevata.weebly.com/uploads/1/3/2/7/132710753/xopulunaxutakodepu.pdfIn PDF document text
    • https://tepupareta.weebly.com/uploads/1/3/0/8/130814680/51c23e3aaa3af.pdfIn PDF document text
    • https://cdn.sqhk.co/kixagixupo/ChAgjgi/ginumamami.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://dokedajonanumi.rf.gd/xajevufedasine.pdfIn PDF document text
    • http://bitugoxopezuwu.rf.gd/timeline_template_excel_2018.pdfIn PDF document text
    • http://velumosak.epizy.com/affidavit_of_adverse_possession_form_florida.pdfIn PDF document text
    • http://fegozewusesib.rf.gd/tatatabinesovoponisuxobi.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001d82d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1D82D 5504 bytes
SHA-256: c135b1d909d577a7f95f0b359d2ebbd1809557b4e814ffd0b7aa63a538947270
font_01_sfnt_off0001eadd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1EADD 15708 bytes
SHA-256: b271071b502eed7959ab54492e9e89060937bdc2e40efb32c81d36cebb527714
font_02_sfnt_off000219f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x219F6 16120 bytes
SHA-256: 6757b8e663b854dbbde5968f3544f34b042868cee9292bfa6805194535ca9ebc
font_03_sfnt_off00022ed1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x22ED1 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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